Machine for inserting fastenings.



H P. MACKENZIE. MACHINE FOR INSBRTING FASTENINGS.

APPLICATION FILED JAN. 2, 1912.

2 'SEBETSJSHEBT 1.

Patented Aug. 11,1914.

F. L. MACKENZIE.

MACHINE FOR INSEETING FASTENINGS. APPLICATION FILED JAN..2, 1912.

1 1 @16 11%};9 3 o Patented Aug. 11, 3914.

2 SHEETSSHEET 2.

TED @TATE@ PATENT @TUFTE.

FRED L. MAUKENZIE, or BEVERLY, mnssnonusnr'rs, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, or P 'rERsoN, new JERSEY, n CORPORATION OF NEW- JERSEY.

Specification of Letters Patent.

MACHINE FOR INSERTING FASTENINGS.

Patented an ii, iaia.

Application filed January 2, 1912. Serial -1\To.- assess.

. Beverly, in thecounty of Essex and State of Massachusetts, have invented certain Improvements in Machines for Inserting Fastenings, of which the following description,

in connection with the accompanying drawings, 1s a specificatlon, like reference characterS on the drawlngs indicating like parts 111 the several figures.

This invention relates to machines for. inserting previously formed fastenings and is herein shown-as embodied in a machine especially adapted to insert headed tacks of the kinds used in the manufacture of boots and shoes. Machines .of this type comprise usu-v ally fastening inserting mechanism, a container 0r pot into which the tacks or other fastenings are thrown in bulk, a raceway which serves to conduct the tacks supported by their heads from the pot to a point adja cent to the inserting mechanism, and a sepa-- rator operating intermittently to separate the endmost tack from the line in the raceway and to deliver it to the inserting mechanism. r i

An object of the invention is to provide improved fastening delivering mechanism for a machine for inserting previously formed fastenings, and particularly to provide an improved tack pot or container and improved separating mechanism.

The tacks used in the manufacture of boots and shoes have usually comparatively sharp points and it is therefore important that any mechanism for handling these tacks and delivering them to the inserting mechanism shall be so constructed and shall operate in such manner that the points do not become bent, dulled or broken. Tack pots as hitherto constructed have been of two general types, those having a stat-ionary container in which a paddle wheel or other tacklifting device operates to stir the tacks up, and throw them upon the raceway, and those having a rotary container which is itself-provided with blades whereby as it rotates it carries the tacks around with it until they fall by' gravity upon the raceway or upon the tack receiving table which serves to guide the tacks into the raceway. It will be apparent that the rotary tack pot is the preferable form of; I tack .pot for handling sharp-pointedtacks since there is less liability of the tacks becoming cramped between a stationary part and a moving part. In rotary tack pots as hitherto constructed,

' however, this liability to injury of the tacks by reason of their becoming wedged between a stationary part and a moving part has not been entirely obviated.

A particular object of the present invention is to provide a tack pot which shall he so' constructed that there is no opportunity for the tacks to become injured.

Other objects of. the invention are to provide improved means for driving the tack pot and novel means for introducing the tacks into the tack pot whereby clogging of the raceway is avoided.

In the accompanying drawings,-Figure 1 is a side elevation of the head'of the machine, viewed from the right of an operator facing the machine; Fig. 2 is a sectional detail showing the novel features of constructionof the tack pot; Fig. 3 is a detail sectional view, illustrating the operation of the separator, and .Fig. 4: is a broken side elevation of the side of the machine opposite to that shown in Fig. 1, this view illustrating especially the mechanism for controlling the starting and stopping of the machine.

The fastening inserting mechanism of the illustrated machine comprises a driver 2 carried by'adriver bar 4 arranged to slide vertically in a guideway in the front part of the head 6, the driver bar 4; being lifted against the tension of a driving spring 8 by a lifting cam, not shown, upon the front end of the main-driving shaft 10, this cam being of ordinary construction. The. driving shaft 10 is driven from a loose ulley 12 which may be clutched to the shaft at the will of the operator by suitable clutch mechanism hereinafter more fully described.

The improved tack holding means, which constitutes one of the principal-features of the present: invention, is carried upon a bracket 14 attached to the rear end of the machine head and comprises astationary hopperportion 16 provided with an annular groove 18 in which the rotary member or tack pot 20 travels. The rotary member 20 of the'tackholding means has a vertical 'flange 22 which is received in the groove 18.

This flange fits snugly the inner curved wall of the groove 18, thereby providing a joint between the rotary and stationary parts of' the tack'hol'ding means intowhich the tacks will not gravitate and into which there is practically no tendency for them to work their way. Also received in the groove 18 is a gear 24 by which the tack pot is driven, this gear being formed integral with the outer surface of the tack pot and meshing with a pinion 26 carried upon the rear end of a short shaft 28 having a bearing 30 cast integral with the hopper 16. The shaft 28 at its inner end carries a gear 32 meshing .with a pinion 34 upon the rear end of the driving shaft 10. The tack pot 20 turns upon a stationary shaft 36 carried by the hopper 16 and is confined upon said shaft by a screw-threaded nut 38 provided with a hand wheel 40, this nutpressing against the tack pot a washer 42 provided-with a groove which receives, a stud, 44 upon the shaft whereby the washer is held against rotation. v

The hopper is provided with a cover 46. In order to introduce the tacks into the hop per in such manner that they will not fall upon the raceway or upon the feeding table 48, the machine being usually stationary at the timethe tacks are put into the hopper, a funnel 50 1s rovided' which conducts the tacks to one s de-of the raceway and causes them to drop directly into the bottom of the hopper. This prevents the raceway from being clogged at the time when the raceway clearing mechanism is not operating. I For conveniencein assembling the machine and for convenience in examining the various parts, the funnel 50 is preferably formed as a separate piece which is hinged to the hopper at 52, the hinge for the cover 46 and for the funnel having a common The raceway clearing mechanism he wn comprises a disk 134 clamped. up ear end of the shaft 10. and having be 0m its surface two tongues 138 n the rotation of the disk with the sh end to knock off from the top of th y near the point where the tacks pa th the cover plate any of the tacks w 2 become lodged crosswise or have ierwise displaced in or upon the *way is shown at 54,- the feeding ta eing attached to the end of the ra ithin the hopper, this table exte ck into the rotary tack pot 20 and rece 18 tacks from the blades 56 upon the 1 urface of said pot as the tacks over the table during the rotation of the 'pot. The raceway conducts the tacks to a point adjacent to the inserting mechanism where they are separated one at a time and delivered toth'e tack receiving throat 58 to be driven by the driver 2 into the work.

The illustrated separating mech anism' of movement, this blade entering a slot 62 at the lower end of the raceway 54 and operating to engage the shank of the endm'ost tack in the raceway and press it against the driver which is normally in its lowermost position. The separating blade 60 is carried by'a depending arm'64 of a separator lever,

'- one of the bearings of'the shaft whereby the arm 64 is held against movement lengthwise of the shaft 70. The movement of the rock-shaft 70 is transmitted to the hub 68 and the arm 64 by aspring'72, coiled about the shaft 70 and having one end connected to a collar 74 clamped upo-n theshaft 70 and its other end bearing against a stud 76 upon the upper end of the hub 68.

The arm 66 is oscillated through connections with a cam groove 78 in a cam wheel 80upon the main shaft 10, cbmprising a cam rol1 82 entering said cam groove 78 and carried uponone arm of a bell-crank lever 84 pivoted upon the machine frame,

the other arm 86 of said bell crank carrying a roll 88 which enters a slot 90 in the arm 66, The separator operating movement of the arm 66- is substantially continuous, but the movement of the separator will not be contmuous owing to the fact that during the first part of its movement it presses the tack against the driver 2. While the driver is rising to release the tack and until the separator 60 is permitted to move again, the spring 72 will be put under tension by the continued movement of the arm 66 and the separator will thus be constantly given a tendency to move so that it will constantly hold the tack against the driver and will move the tack into the driver passage as soon as it is permitted to do so.

The -means for controlling the starting and stopping of the machine is of the type shown in the patent to Woodward, No. 389,275, September 11, 1888, except that the means herein shown is controlled from the held. in its clutch releasin position by a catch plate 102 upon a late 104, the catch plate engaging a second catch plate 106 upon thelever 94. The latch104 is carried by a lever 108 fulcrumed at 110 'upon the machine head, the latch being adjustable upon said lever'by means of an eccentric v 112. At its upper end thelever 108 carries a cam roll which enters the cam groove 7 8 in the cam disk 80. The latch 104 is normally held in operative relation to the lever 94 by a spring 114 connected ,to an extension 116 of said latch and to the machine. head. To move the catch plate 102 out of operative relation to the catch plate 104,..connections are provided to a treadle 11S whereby the latch 104 may be turned about its \pivotal connection with the lever 108.-

The illustrated connections comprise a bellcran k'120 provided with a hook 122 which hooks over a stud, not shown, upon the rear face of the latch 104, the bell crank 120 being pivoted upon a slide 124 connected by a rod 126 to the treadle 118-, this slide extending from one side'of the head to the other, as shown in'Figs. 1 and 4. A spring 128 tends to keep the hook 122 in engagement with the stud upon the latch 104. When the operator releases the treadle after the machine has been actuated, the latch 104 will move upward until the catch plate 102 engages the catch plate 106. If at this time the lever 108 isnear the right-hand end of'its movement, viewing Fig. 4, the catch plate 102 will moveinto such position that as the lever 108 is moved toward the left upon .the continued rotation of the shaft 10, the lever 94 will be moved toward the left in Fig. 4, carrying with it the pulley 12 out of engagement with the clutch member 92. This movement of the lever 94 will move the hollow frustum of a cone 130, more fully shown in the patent above referred to, into engagement with .a frustum 131 upon the shaft 10, also more fully shown in said Letters Patent. mally held spring 132.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a machine of the class described, a tack pot arranged to rotate about. a horizontal axis, a hopper arranged to introduce The treadle ,118 is norits raised position by a the tacks into one side of the tack pot, said hopper and said tack pot being provided with vertical abutting faces, and means for rotating said tack pot comprising a pcripheral gear forming a flange upon said tack pot having a face substantially flush with the aforementioned vertical face, said hopper being provided with a groove in which the abuttin portion of said tack pot is confined toget er with said peripheral gear.

,2. In a machine of the class described, a tack pot arranged to rotate about a horizon--,

tal axis, a hopper arranged to introduce the tacks into oneside of the tack pot, said hopper and said tack pot being provided with vertical abutting faces and said hopper being provided with a groove in which the abutting portion of said tack pot is con- 

